Austin's sister (Katelyn) comes to visit for the week, Ally is jealous that Austin & Katelyn have been spending a lot of time together, Meanwhile, Trish & Dez knew Austin & Ally's secrets, Trish & Dez stood up in front of the stage in Sonic Boom, And told everyone Austin & Ally's secrets and everyone was laughing and pointing at Austin & Ally, And they both left, Katelyn felt bad for Austin, But then Austin's mother had to take Katelyn away because Katelyn had college, Ally was happy that she left, But Austin didn't, Ally kissed Austin for a second, And then Austin felt happy again